SOME VISCOELASTIC PROPERTIES OF AMMINE SUBSTITUTED DICHLOROZINC POLYMERS
PRINCETON UNIV N J FRICK CHEMICAL LAB
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An attempt was made to determine the molecular weight, distribution of molecular weights, and the relaxation mechanism of monammine-dichlorozinc. The study of ammine substituted dichlorozincs included determinations of 1 glass transition temperatures 2 modulus-temperature curves and 3 maximum relaxation times as function of temperature. Glass transition temperatures were obtained by determining the weight of the samples in toluene as a function of temperature, the inflection point yielding transition temperature value. The results for ZnCl2.12NH3, ZnCl2.1 NH3, and ZnCl2.1 12 NH3 were close, the values varying between 6 to 11 or -2. The modulustemperature curve of the monoammine sample was similar to that of polystyrene or inorganic polymers such as amorphous Se. No rubbery plateau was encountered. A preliminary calculation yielded the value of 30 monomer units for the monoammine on the basis of stress relaxation studies.